Monkey wrench



/ April 29, 19247* $.SZASTALO MONKEY WRENCH Filed AHK. 7. 1922 Patented Apr. 29, 1924.

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.STANLEY szesrano, or ViviwvYoBK. N. Y.

MONKEY WRENCH.

Application niet August 7, 1922. serialy No. 579,996. n

To all whom t may! concern.'

Be it known that l, STANLEY SZAsrALo, a citizen of Poland. residing at New York, in the county of New York and State of New York. have invented certain new and useful Improvements in Monkey Wrenches, of which the following` is a specification. K

This invention relates generally to wrenches. havingmore particular references to wrenches of the type commonly known as monkey wrenches, and which comprise fixed and sliding jaws.

The present invention has for an object the provision of a novel and simple means which willpermit of rapid adjustment oi' the slidingf jawwhen the jaw space requires considerable variation.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the followinny description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Figure 1 of the drawings is a side view ot a wrench constructed according to the invention;

Fig. 2 is a longitudinal sectional view taken on the line 2 2 of Fig. 1;

Fig. 3 is a transverse sectional view thereof. taken on the line 3-3 of Fig, 2;

Fig. 4 is a fragmentary longitudinal sectional view. showing a. modification; and

Fig. 5 is a transverse sectional view of the modified wrench. this view being taken on the line 5-5 of Fig. 4.

As here embodied, my improved wrench comprises the shank 10 on one end of which is the fixed j aw 11, the opposite end forming the wrench handle.l being here shown as provided with suitable wooden facing elements 12.

Upon the shank 10 a sliding jaw 13 is mounted, the novel features of the present invention relating to the adjustment of this jaw. Adjustment of the jaw 13 is effected by means of a screw 14 which extends along the front side of the shank 10, being suitably engaged at one end to permit of rotation but prevent axial movement, with a collar 15 on the shank 10, the screw being provided with a knurled head 16 for turning purposes.

This screw 14 is flattened on opposite sides as at 17 to form arcuate screw threads and projects into a boring 18 in the sliding jaw 13,- this boring having likewise arcuate screw threads 19y formed therein, the threads on screw and boring extending through arcs of slightly less than ninety degrees.

Fixed to the screw 14 is an axially projecting pin 20, which extends into a chamber 21 in the collar 15 and has connected thereto one end of a coiled spring 22 whose opposite end is connected to the collar 415. This spring 22 actsto normally urge the screw to a position with itsteeth engaging the teeth 19 of the jaw 13, as in Fig. 3, the screw being retained in this position by engagement with a stop 24 in the boring 18.

When the jaw 13 is to be adjusted, the screw 14 is rotated one-quarter turn, against the action of spring 22, tovfree its teeth from the teeth on the jaw. The latter may then be slid along the shank 10, being provided with a thumb piece 25 on its back'to facilitate this movement, until it reaches the desired position. The screw 14 is then released and is Vmoved by springr 22 to reengage withthe threads 19, locking the jaw in its new position.

In Figs. 4 and 5, 1 have shown a modification which obviates the necessity of holding the head 16 with one hand while the jaw is being adjusted. In this modification the shank 10 is formed with a longitudinal slot 30 through which projects a pin 31 slidably carried bythe sliding jaw 13. The outer end of this pin 31 has a head 32 thereon, while the inner end has a diminished projection 33 which is adapted to engage in a longitudinal `groove 34 in one of the 'Hattened sides of the screw 14. A coiled spring 35, located in a recess in the jaw 15l n 36 on the pin 31 holds the end 33 thereof away from the groove 34. The remaining parts are as shown in Figs. 1 to 3.

When the jaw is to be adjusted, the screw 14 is first turned, and the head 32 of the pin 31 is then pressed to move the end 33 into the groove 34,' the jaw 13 then being moved to the desired position while the pin remains pressed inwardly.

Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows 1. A wrench comprising a shank having a longitudinal slot formed therein, a jaw slidable on said shank and formed with a boringr having arcuate screw threads, a screw swiveled on the shank and having its opand bearing against a collar positie sides attened to form arcuate threads through the said slot in the shank andy adapted to be engaged asdesired With the groove in the screw to hold the latter in position with its threads disengaged from the threads in the said boring;

2. A Wrench Comprising: a shank having a longitudinal slot formed therein'. a jaw slidable on said shank and formed with a boring havingr arcuate screw threads, a screw swiveledon the shank and having its oppo'` site sides flattened to form arcuate threads adapted to engage thethreads of the said boring, ,said screw having a longitudinal groove formed in one of the flattened sides thereof, a'spring normally urging said screw to a position with its threads engaged with the threads of the said boring, and a pin slidably carried hy the said jaw and passing throughvthe said slot in the shank and adapted to be engaged as desired With the groove in the screw to hold the latter in positionfwith` its threads disengaged from the threads in the said llooring, and a spring normally holding the said pin disengaged from the said' groove. l

In testimony whereof I have affixed my signature.v

STANLEY SZASTALO. 

